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According to this logic, one could chain an infinite number or sub-panels off of a single one hundred amp feed. The second law of thermodynamics prevents this. An hundred amp service is not capable of powering another hundred amp service unless you are trying to move your panel and all of the circuits it feeds as well, without adding another hundred amp load. NEC (National Electrcial Code NFPA Book 72) states that certain loads can be derated but not to this extent.
As far as the voltage drop is concerned, you need only worry about this with runs of about two hundred and twenty five feet or more for a 200 Amp Service running 2/0 2/0 4/0 URD direct burial aluminum.
What you need is a new 200 Amp service to feed your original 100A panel and another hundred amps to feed your new load.
for USA, Canada and countries running a 60 Hertz supply service.Yes you can as long as the feeder to the other 100 amp panel is equal to the ampacity of the breaker. In this case you would need to use a #3 wire rated at 90 degrees C if the distance to the other panel is under 50 feet. If the distance is longer that this a voltage drop calculation would have to be added to increase the wire size.<<>>
My experience would lead me to believe that you could not install a breaker that was greater to or equal to the rating of the main breaker. To add a sub-panel, you will need to install a breaker that is half or lower than the main breaker.
In your case, you have a 100A service; you will need to install a 50A or smaller breaker to service the sub panel.
Consult an electrician if in doubt.
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Wiki User
∙ 8y ago
Wiki User
∙ 12y agoYou can but your still only going to get 100 amps total between the two panels. Just because it is a 100 amps sub panel does not mean you have to feed it with 100 amps. Figure out how many amps you'll need at the sub and you may only need to feed it with 50 or 60 amps.
Wiki User
∙ 11y agoIf you mean can he amps of each breaker in a panel add up to more than the rating of the panel then the answer is yes. In a panel design the electrician takes into account that each circuit will never be at its full capacity all the time. If each breaker was maxed out to just below its rated current and didn't trip, then the main breaker would trip if its rating was exceeded. This is highly unlikely with proper sizing of mains and individual breakers under normal circumstances.
Wiki User
∙ 12y agoThe electrical code states the the minimum size conductors for a 200 amp service to be 3/0 copper or 4/0 aluminum. 4/0 aluminum is rated at 185 amps but the code allows for use of this wire if the insulation factor of the wire is 90 degrees C. This also allows the aluminum wire to be pulled into a 2" service stack.
Wiki User
∙ 7y agoWhat you are looking at is a two pole 100 amp breaker. Distribution panels in North America are designed to use 120/240 volts. Any two adjacent breakers will give you a 240 volt circuit and either leg to the neutral will give you 120 volts.
On the main breaker of a panel the number stated on the breaker is the amount of amperage that the breaker will allow to pass before tripping regardless of which leg the current passes through.
A 200 amp service will have a two pole main breaker with a rating stating its capacity of 200 amps.
Wire size into the breaker will give you a good clue as 100 amp breakers will use a #3 conductor whereas a 200 amp breaker will be fed with a 3/0 conductor.
Wiki User
∙ 8y agoNo it does not mean you have a 200 amp service. you should / could possibly have a "main" breaker. That breaker size is your service size.
Wiki User
∙ 8y agoYes. Five 20 amp breakers would be 100 amps. It doesn't work that way. The load placed on this box at any given time cannot exceed 100 amps. You can put as many breakers as it will hold.
Wiki User
∙ 13y agoYour main breaker cannot exceed the rating of your panel.
Wiki User
∙ 11y agoYes, run 4 AWG copper between the panels protected by a 100 amp breaker.
Wiki User
∙ 11y agoNo, 100 amps would be the maximum of the total amp ratings of the other breakers.
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Can you tap off of a 200 amp service for 2 100 amp panels?
Yes, but at every reduction in wire size there has to be a breaker sized to the smaller wire size. The wire size for 100 amp panels is recommended at #3 copper conductor. From the 200 amp feeder panel you will require a 100 amp two pole breaker for each of the two 100 amp services. Keep in mind that if you run the 100 amp services close to maximum this will take away the capacity of the 200 amp service for other branch circuits coming off of it. Also keep in mind that if the panels are located, not in the same building as the 200 amp service that the 100 amp panels will be treated as separate services and will have to be constructed like a 100 amp service. This includes ground rods. Also the bonding screw will have to be removed that connects the neutral buss to the panel enclosure.
How many sub panels can you have off an 100 amp 2 phase residential service?
The key is that you still only have 100 Amps to work with. You could have multiple small panels if needed for convenience, but the total capacity for constant load should not exceed 80% of maximum or 80 Amps. Also make sure neutral and ground only bonded together at main panel.
What size service cable for 100 amp main panel 100 feet away?
20Sqmm
What is the largest sub panel you can install off from a 60 amp main panel fed by 100 amp service?
If what you state in this question is accurate this is an illegal installation. A 100 amp service can not have any equipment connected to it less that that of the service size. The 60 amp main panel must be a 100 amp panel to be a legal installation.
How many amps can you take off the power pole if its 100 amp in service service now?
It depends on a lot of factors. Since you will have to get an electrician involved you should start there. It is likely that you can double the capacity, but the electrician would consult with your power company to determine what is possible. I recently went from 200 A to 400 A service with a large addition; and a transformer was required in the house with rework of the two panels I already had into 5 panels.
Can you tap off of a 200 amp service for 2 100 amp panels?
Yes, but at every reduction in wire size there has to be a breaker sized to the smaller wire size. The wire size for 100 amp panels is recommended at #3 copper conductor. From the 200 amp feeder panel you will require a 100 amp two pole breaker for each of the two 100 amp services. Keep in mind that if you run the 100 amp services close to maximum this will take away the capacity of the 200 amp service for other branch circuits coming off of it. Also keep in mind that if the panels are located, not in the same building as the 200 amp service that the 100 amp panels will be treated as separate services and will have to be constructed like a 100 amp service. This includes ground rods. Also the bonding screw will have to be removed that connects the neutral buss to the panel enclosure.
How many sub panels can you have off an 100 amp 2 phase residential service?
The key is that you still only have 100 Amps to work with. You could have multiple small panels if needed for convenience, but the total capacity for constant load should not exceed 80% of maximum or 80 Amps. Also make sure neutral and ground only bonded together at main panel.
What size service cable for 100 amp main panel 100 feet away?
20Sqmm
Can two 225 amp panels be fed from a 400 amp breaker?
Yes, but they obviously cannot be simultaneously loaded their maximum loads because the 400-amp breaker will blow well before that. Similarly, you can have multiple 100-amp panels fed from a 200-Amp main breaker, knowing that you will NEVER have 100 amps running in all panels at the same time.
What is the largest sub panel you can install off from a 60 amp main panel fed by 100 amp service?
If what you state in this question is accurate this is an illegal installation. A 100 amp service can not have any equipment connected to it less that that of the service size. The 60 amp main panel must be a 100 amp panel to be a legal installation.
What is the price range of shower panels?
The price of shower panels will differ based on the brand and size of the panels. Generally, shower panels will cost in the region of $100. Visit shower specialists.
How many amps can you take off the power pole if its 100 amp in service service now?
It depends on a lot of factors. Since you will have to get an electrician involved you should start there. It is likely that you can double the capacity, but the electrician would consult with your power company to determine what is possible. I recently went from 200 A to 400 A service with a large addition; and a transformer was required in the house with rework of the two panels I already had into 5 panels.
Can you run an additional breaker panel parallel to the existing one?
It is not in parallel. You put a breaker in existing panel and use that to feed the subpanel. The Amperage of this subfeed breaker should match the rating of the new panel. For example a 100A breaker might be typical. Remember that ground and neutral are only "bonded" at the main panel. Usually a subpanel has a means to separate the neutral and ground in a subpanel. Be careful since everything about doing this is dangerous.Another AnswerYes, you can have two breaker panels in parallel. If you had a 100 amp panel on a 200 amp service (or increase the size of the service, check with your power company on the size of your service, you could add a second 100 amp panel in parallel with the first. You can have up to 6 disconnects per service, but they must be located adjacent to each other or in the same enclosure. So either install the second panel beside the first or a 100 amp disconnect beside the first panel and feed out of the disconnect to the new panel located where you need it.
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